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Store lowering outputs per owner.

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This commit is contained in:
Camille GILLOT 2021-07-16 14:42:26 +02:00
parent f9e1de979d
commit 48a339ddbb
13 changed files with 170 additions and 125 deletions
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1
Cargo.lock
View File

@ -4088,6 +4088,7 @@ dependencies = [
"polonius-engine",
"rand 0.8.4",
"rand_xoshiro 0.6.0",
"rustc-rayon",
"rustc-rayon-core",
"rustc_apfloat",
"rustc_arena",

5
compiler/rustc_ast_lowering/src/expr.rs
View File

@ -252,9 +252,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
}
// Merge attributes into the inner expression.
if !e.attrs.is_empty() {
let old_attrs = self.attrs.get(&ex.hir_id).map(|la| *la).unwrap_or(&[]);
let old_attrs =
self.attrs.get(&ex.hir_id.local_id).map(|la| *la).unwrap_or(&[]);
self.attrs.insert(
ex.hir_id,
ex.hir_id.local_id,
&*self.arena.alloc_from_iter(
e.attrs
.iter()

13
compiler/rustc_ast_lowering/src/item.rs
View File

@ -10,6 +10,7 @@ use rustc_errors::struct_span_err;
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::LocalDefId;
use rustc_index::vec::Idx;
use rustc_span::source_map::{respan, DesugaringKind};
use rustc_span::symbol::{kw, sym, Ident};
use rustc_span::Span;
@ -99,7 +100,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
) -> T {
let old_len = self.in_scope_lifetimes.len();
let parent_generics = match self.owners[parent_hir_id].unwrap().expect_item().kind {
let parent_generics =
match self.owners[parent_hir_id].as_ref().unwrap().node.expect_item().kind {
hir::ItemKind::Impl(hir::Impl { ref generics, .. })
| hir::ItemKind::Trait(_, _, ref generics, ..) => generics.params,
_ => &[],
@ -493,7 +495,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
let kind = hir::ItemKind::Use(path, hir::UseKind::Single);
let vis = this.rebuild_vis(&vis);
if let Some(attrs) = attrs {
this.attrs.insert(hir::HirId::make_owner(new_id), attrs);
this.attrs.insert(hir::ItemLocalId::new(0), attrs);
}
let item = hir::Item {
@ -568,7 +570,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
let kind =
this.lower_use_tree(use_tree, &prefix, id, &mut vis, &mut ident, attrs);
if let Some(attrs) = attrs {
this.attrs.insert(hir::HirId::make_owner(new_hir_id), attrs);
this.attrs.insert(hir::ItemLocalId::new(0), attrs);
}
let item = hir::Item {
@ -971,7 +973,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
) -> hir::BodyId {
let body = hir::Body { generator_kind: self.generator_kind, params, value };
let id = body.id();
self.bodies.insert(id, body);
debug_assert_eq!(id.hir_id.owner, self.current_hir_id_owner);
self.bodies.insert(id.hir_id.local_id, body);
id
}
@ -1124,7 +1127,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
//
// If this is the simple case, this parameter will end up being the same as the
// original parameter, but with a different pattern id.
let stmt_attrs = this.attrs.get(&parameter.hir_id).copied();
let stmt_attrs = this.attrs.get(&parameter.hir_id.local_id).copied();
let (new_parameter_pat, new_parameter_id) = this.pat_ident(desugared_span, ident);
let new_parameter = hir::Param {
hir_id: parameter.hir_id,

94
compiler/rustc_ast_lowering/src/lib.rs
View File

@ -35,14 +35,13 @@
#![feature(iter_zip)]
#![recursion_limit = "256"]
use rustc_ast::node_id::NodeMap;
use rustc_ast::token::{self, Token};
use rustc_ast::tokenstream::{CanSynthesizeMissingTokens, TokenStream, TokenTree};
use rustc_ast::visit;
use rustc_ast::{self as ast, *};
use rustc_ast_pretty::pprust;
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::sync::Lrc;
use rustc_errors::{struct_span_err, Applicability};
use rustc_hir as hir;
@ -97,13 +96,12 @@ struct LoweringContext<'a, 'hir: 'a> {
arena: &'hir Arena<'hir>,
/// The items being lowered are collected here.
owners: IndexVec<LocalDefId, Option<hir::OwnerNode<'hir>>>,
bodies: BTreeMap<hir::BodyId, hir::Body<'hir>>,
owners: IndexVec<LocalDefId, Option<hir::OwnerInfo<'hir>>>,
bodies: BTreeMap<hir::ItemLocalId, hir::Body<'hir>>,
attrs: BTreeMap<hir::ItemLocalId, &'hir [Attribute]>,
generator_kind: Option<hir::GeneratorKind>,
attrs: BTreeMap<hir::HirId, &'hir [Attribute]>,
/// When inside an `async` context, this is the `HirId` of the
/// `task_context` local bound to the resume argument of the generator.
task_context: Option<hir::HirId>,
@ -152,6 +150,9 @@ struct LoweringContext<'a, 'hir: 'a> {
item_local_id_counter: hir::ItemLocalId,
node_id_to_hir_id: IndexVec<NodeId, Option<hir::HirId>>,
/// NodeIds that are lowered inside the current HIR owner.
local_node_ids: Vec<NodeId>,
allow_try_trait: Option<Lrc<[Symbol]>>,
allow_gen_future: Option<Lrc<[Symbol]>>,
}
@ -182,7 +183,7 @@ pub trait ResolverAstLowering {
fn next_node_id(&mut self) -> NodeId;
fn take_trait_map(&mut self) -> NodeMap<Vec<hir::TraitCandidate>>;
fn take_trait_map(&mut self, node: NodeId) -> Option<Vec<hir::TraitCandidate>>;
fn opt_local_def_id(&self, node: NodeId) -> Option<LocalDefId>;
@ -314,12 +315,13 @@ pub fn lower_crate<'a, 'hir>(
) -> &'hir hir::Crate<'hir> {
let _prof_timer = sess.prof.verbose_generic_activity("hir_lowering");
let owners = IndexVec::from_fn_n(|_| None, resolver.definitions().def_index_count());
LoweringContext {
sess,
resolver,
nt_to_tokenstream,
arena,
owners: IndexVec::default(),
owners,
bodies: BTreeMap::new(),
attrs: BTreeMap::default(),
catch_scope: None,
@ -331,6 +333,7 @@ pub fn lower_crate<'a, 'hir>(
current_hir_id_owner: CRATE_DEF_ID,
item_local_id_counter: hir::ItemLocalId::new(0),
node_id_to_hir_id: IndexVec::new(),
local_node_ids: Vec::new(),
generator_kind: None,
task_context: None,
current_item: None,
@ -420,14 +423,6 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
hir::OwnerNode::Crate(lctx.arena.alloc(module))
});
let mut trait_map: FxHashMap<_, FxHashMap<_, _>> = FxHashMap::default();
for (k, v) in self.resolver.take_trait_map().into_iter() {
if let Some(Some(hir_id)) = self.node_id_to_hir_id.get(k) {
let map = trait_map.entry(hir_id.owner).or_default();
map.insert(hir_id.local_id, v.into_boxed_slice());
}
}
let mut def_id_to_hir_id = IndexVec::default();
for (node_id, hir_id) in self.node_id_to_hir_id.into_iter_enumerated() {
@ -441,16 +436,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
self.resolver.definitions().init_def_id_to_hir_id_mapping(def_id_to_hir_id);
#[cfg(debug_assertions)]
for (&id, attrs) in self.attrs.iter() {
// Verify that we do not store empty slices in the map.
if attrs.is_empty() {
panic!("Stored empty attributes for {:?}", id);
}
}
let krate =
hir::Crate { owners: self.owners, bodies: self.bodies, trait_map, attrs: self.attrs };
let krate = hir::Crate { owners: self.owners };
self.arena.alloc(krate)
}
@ -468,25 +454,57 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
) -> LocalDefId {
let def_id = self.resolver.local_def_id(owner);
// Always allocate the first `HirId` for the owner itself.
let _old = self.node_id_to_hir_id.insert(owner, hir::HirId::make_owner(def_id));
debug_assert_eq!(_old, None);
let current_attrs = std::mem::take(&mut self.attrs);
let current_bodies = std::mem::take(&mut self.bodies);
let current_node_ids = std::mem::take(&mut self.local_node_ids);
let current_owner = std::mem::replace(&mut self.current_hir_id_owner, def_id);
let current_local_counter =
std::mem::replace(&mut self.item_local_id_counter, hir::ItemLocalId::new(1));
let item = f(self);
// Always allocate the first `HirId` for the owner itself.
let _old = self.node_id_to_hir_id.insert(owner, hir::HirId::make_owner(def_id));
debug_assert_eq!(_old, None);
self.local_node_ids.push(owner);
let item = f(self);
let info = self.make_owner_info(item);
self.attrs = current_attrs;
self.bodies = current_bodies;
self.local_node_ids = current_node_ids;
self.current_hir_id_owner = current_owner;
self.item_local_id_counter = current_local_counter;
let _old = self.owners.insert(def_id, item);
let _old = self.owners.insert(def_id, info);
debug_assert!(_old.is_none());
def_id
}
fn make_owner_info(&mut self, node: hir::OwnerNode<'hir>) -> hir::OwnerInfo<'hir> {
let attrs = std::mem::take(&mut self.attrs);
let bodies = std::mem::take(&mut self.bodies);
let local_node_ids = std::mem::take(&mut self.local_node_ids);
let trait_map = local_node_ids
.into_iter()
.filter_map(|node_id| {
let hir_id = self.node_id_to_hir_id[node_id]?;
let traits = self.resolver.take_trait_map(node_id)?;
Some((hir_id.local_id, traits.into_boxed_slice()))
})
.collect();
#[cfg(debug_assertions)]
for (&id, attrs) in attrs.iter() {
// Verify that we do not store empty slices in the map.
if attrs.is_empty() {
panic!("Stored empty attributes for {:?}", id);
}
}
hir::OwnerInfo { node, attrs, bodies, trait_map }
}
/// This method allocates a new `HirId` for the given `NodeId` and stores it in
/// the `LoweringContext`'s `NodeId => HirId` map.
/// Take care not to call this method if the resulting `HirId` is then not
@ -501,6 +519,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
let owner = self.current_hir_id_owner;
let local_id = self.item_local_id_counter;
self.item_local_id_counter.increment_by(1);
self.local_node_ids.push(ast_node_id);
hir::HirId { owner, local_id }
})
}
@ -791,9 +810,10 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
if attrs.is_empty() {
None
} else {
debug_assert_eq!(id.owner, self.current_hir_id_owner);
let ret = self.arena.alloc_from_iter(attrs.iter().map(|a| self.lower_attr(a)));
debug_assert!(!ret.is_empty());
self.attrs.insert(id, ret);
self.attrs.insert(id.local_id, ret);
Some(ret)
}
}
@ -819,9 +839,11 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
}
fn alias_attrs(&mut self, id: hir::HirId, target_id: hir::HirId) {
if let Some(&a) = self.attrs.get(&target_id) {
debug_assert_eq!(id.owner, self.current_hir_id_owner);
debug_assert_eq!(target_id.owner, self.current_hir_id_owner);
if let Some(&a) = self.attrs.get(&target_id.local_id) {
debug_assert!(!a.is_empty());
self.attrs.insert(id, a);
self.attrs.insert(id.local_id, a);
}
}
@ -2066,7 +2088,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
let hir_id = self.next_id();
if let Some(a) = attrs {
debug_assert!(!a.is_empty());
self.attrs.insert(hir_id, a);
self.attrs.insert(hir_id.local_id, a);
}
let local = hir::Local { hir_id, init, pat, source, span: self.lower_span(span), ty: None };
self.stmt(span, hir::StmtKind::Local(self.arena.alloc(local)))

39
compiler/rustc_hir/src/hir.rs
View File

@ -662,6 +662,16 @@ pub struct WhereEqPredicate<'hir> {
pub rhs_ty: &'hir Ty<'hir>,
}
#[derive(Debug)]
pub struct OwnerInfo<'hir> {
pub node: OwnerNode<'hir>,
pub attrs: BTreeMap<ItemLocalId, &'hir [Attribute]>,
pub bodies: BTreeMap<ItemLocalId, Body<'hir>>,
/// Map indicating what traits are in scope for places where this
/// is relevant; generated by resolve.
pub trait_map: FxHashMap<ItemLocalId, Box<[TraitCandidate]>>,
}
/// The top-level data structure that stores the entire contents of
/// the crate currently being compiled.
///
@ -670,40 +680,39 @@ pub struct WhereEqPredicate<'hir> {
/// [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/hir.html
#[derive(Debug)]
pub struct Crate<'hir> {
pub owners: IndexVec<LocalDefId, Option<OwnerNode<'hir>>>,
pub bodies: BTreeMap<BodyId, Body<'hir>>,
/// Map indicating what traits are in scope for places where this
/// is relevant; generated by resolve.
pub trait_map: FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Box<[TraitCandidate]>>>,
/// Collected attributes from HIR nodes.
pub attrs: BTreeMap<HirId, &'hir [Attribute]>,
pub owners: IndexVec<LocalDefId, Option<OwnerInfo<'hir>>>,
}
impl Crate<'hir> {
pub fn module(&self) -> &'hir Mod<'hir> {
if let Some(OwnerNode::Crate(m)) = self.owners[CRATE_DEF_ID] { m } else { panic!() }
let i = self.owners[CRATE_DEF_ID].as_ref().unwrap().node;
if let OwnerNode::Crate(m) = i { m } else { panic!() }
}
pub fn item(&self, id: ItemId) -> &'hir Item<'hir> {
self.owners[id.def_id].as_ref().unwrap().expect_item()
self.owners[id.def_id].as_ref().unwrap().node.expect_item()
}
pub fn trait_item(&self, id: TraitItemId) -> &'hir TraitItem<'hir> {
self.owners[id.def_id].as_ref().unwrap().expect_trait_item()
self.owners[id.def_id].as_ref().unwrap().node.expect_trait_item()
}
pub fn impl_item(&self, id: ImplItemId) -> &'hir ImplItem<'hir> {
self.owners[id.def_id].as_ref().unwrap().expect_impl_item()
self.owners[id.def_id].as_ref().unwrap().node.expect_impl_item()
}
pub fn foreign_item(&self, id: ForeignItemId) -> &'hir ForeignItem<'hir> {
self.owners[id.def_id].as_ref().unwrap().expect_foreign_item()
self.owners[id.def_id].as_ref().unwrap().node.expect_foreign_item()
}
pub fn body(&self, id: BodyId) -> &Body<'hir> {
&self.bodies[&id]
let HirId { owner, local_id } = id.hir_id;
&self.owners[owner].as_ref().unwrap().bodies[&local_id]
}
pub fn attrs(&self, id: HirId) -> &'hir [Attribute] {
let HirId { owner, local_id } = id;
&self.owners[owner].as_ref().unwrap().attrs.get(&local_id).map(|la| *la).unwrap_or(&[])
}
}

1
compiler/rustc_middle/Cargo.toml
View File

@ -12,6 +12,7 @@ bitflags = "1.2.1"
either = "1.5.0"
gsgdt = "0.1.2"
tracing = "0.1"
rustc-rayon = "0.3.1"
rustc-rayon-core = "0.3.1"
polonius-engine = "0.13.0"
rustc_apfloat = { path = "../rustc_apfloat" }

16
compiler/rustc_middle/src/hir/map/collector.rs
View File

@ -86,12 +86,7 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
collector
}
pub(super) fn finalize_and_compute_crate_hash(mut self) -> IndexedHir<'hir> {
// Insert bodies into the map
for (id, body) in self.krate.bodies.iter() {
let bodies = &mut self.map[id.hir_id.owner].as_mut().unwrap().bodies;
assert!(bodies.insert(id.hir_id.local_id, body).is_none());
}
pub(super) fn finalize_and_compute_crate_hash(self) -> IndexedHir<'hir> {
IndexedHir { map: self.map, parenting: self.parenting }
}
@ -101,9 +96,14 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
let mut nodes = IndexVec::new();
nodes.push(Some(ParentedNode { parent: ItemLocalId::new(0), node: node.into() }));
let mut bodies = FxHashMap::default();
for (id, body) in self.krate.owners[owner].as_ref().unwrap().bodies.iter() {
let _old = bodies.insert(*id, body);
debug_assert!(_old.is_none());
}
debug_assert!(self.map[owner].is_none());
self.map[owner] =
Some(self.arena.alloc(OwnerNodes { hash, nodes, bodies: FxHashMap::default() }));
self.map[owner] = Some(self.arena.alloc(OwnerNodes { hash, nodes, bodies }));
}
fn insert(&mut self, span: Span, hir_id: HirId, node: Node<'hir>) {

50
compiler/rustc_middle/src/hir/map/mod.rs
View File

@ -1,6 +1,6 @@
use self::collector::NodeCollector;
use crate::hir::{AttributeMap, IndexedHir, ModuleItems, Owner};
use crate::hir::{IndexedHir, ModuleItems, Owner};
use crate::ty::TyCtxt;
use rustc_ast as ast;
use rustc_data_structures::fingerprint::Fingerprint;
@ -166,8 +166,8 @@ impl<'hir> Map<'hir> {
pub fn items(&self) -> impl Iterator<Item = &'hir Item<'hir>> + 'hir {
let krate = self.krate();
krate.owners.iter().filter_map(|owner| match owner.as_ref()? {
OwnerNode::Item(item) => Some(*item),
krate.owners.iter().filter_map(|owner| match owner.as_ref()?.node {
OwnerNode::Item(item) => Some(item),
_ => None,
})
}
@ -495,11 +495,35 @@ impl<'hir> Map<'hir> {
/// crate. If you would prefer to iterate over the bodies
/// themselves, you can do `self.hir().krate().body_ids.iter()`.
pub fn body_owners(self) -> impl Iterator<Item = LocalDefId> + 'hir {
self.krate().bodies.keys().map(move |&body_id| self.body_owner_def_id(body_id))
self.krate()
.owners
.iter_enumerated()
.flat_map(move |(owner, owner_info)| {
let bodies = &owner_info.as_ref()?.bodies;
Some(bodies.keys().map(move |&local_id| {
let hir_id = HirId { owner, local_id };
let body_id = BodyId { hir_id };
self.body_owner_def_id(body_id)
}))
})
.flatten()
}
pub fn par_body_owners<F: Fn(LocalDefId) + Sync + Send>(self, f: F) {
par_for_each_in(&self.krate().bodies, |(&body_id, _)| f(self.body_owner_def_id(body_id)));
use rustc_data_structures::sync::{par_iter, ParallelIterator};
#[cfg(parallel_compiler)]
use rustc_rayon::iter::IndexedParallelIterator;
par_iter(&self.krate().owners.raw).enumerate().for_each(|(owner, owner_info)| {
let owner = LocalDefId::new(owner);
if let Some(owner_info) = owner_info {
par_iter(&owner_info.bodies).for_each(|(&local_id, _)| {
let hir_id = HirId { owner, local_id };
let body_id = BodyId { hir_id };
f(self.body_owner_def_id(body_id))
})
}
});
}
pub fn ty_param_owner(&self, id: HirId) -> HirId {
@ -551,12 +575,17 @@ impl<'hir> Map<'hir> {
/// Walks the attributes in a crate.
pub fn walk_attributes(self, visitor: &mut impl Visitor<'hir>) {
let krate = self.krate();
for (&id, attrs) in krate.attrs.iter() {
for (owner, info) in krate.owners.iter_enumerated() {
if let Some(info) = info {
for (&local_id, attrs) in info.attrs.iter() {
let id = HirId { owner, local_id };
for a in *attrs {
visitor.visit_attribute(id, a)
}
}
}
}
}
/// Visits all items in the crate in some deterministic (but
/// unspecified) order. If you just need to process every item,
@ -572,7 +601,7 @@ impl<'hir> Map<'hir> {
{
let krate = self.krate();
for owner in krate.owners.iter().filter_map(Option::as_ref) {
match owner {
match owner.node {
OwnerNode::Item(item) => visitor.visit_item(item),
OwnerNode::ForeignItem(item) => visitor.visit_foreign_item(item),
OwnerNode::ImplItem(item) => visitor.visit_impl_item(item),
@ -588,7 +617,7 @@ impl<'hir> Map<'hir> {
V: itemlikevisit::ParItemLikeVisitor<'hir> + Sync + Send,
{
let krate = self.krate();
par_for_each_in(&krate.owners.raw, |owner| match owner.as_ref() {
par_for_each_in(&krate.owners.raw, |owner| match owner.as_ref().map(|o| o.node) {
Some(OwnerNode::Item(item)) => visitor.visit_item(item),
Some(OwnerNode::ForeignItem(item)) => visitor.visit_foreign_item(item),
Some(OwnerNode::ImplItem(item)) => visitor.visit_impl_item(item),
@ -1091,7 +1120,10 @@ pub(super) fn crate_hash(tcx: TyCtxt<'_>, crate_num: CrateNum) -> Svh {
for (def_path_hash, fingerprint, def_id) in hir_body_nodes.iter() {
def_path_hash.0.hash_stable(&mut hcx, &mut stable_hasher);
fingerprint.hash_stable(&mut hcx, &mut stable_hasher);
AttributeMap { map: &tcx.untracked_crate.attrs, prefix: *def_id }
tcx.untracked_crate.owners[*def_id]
.as_ref()
.unwrap()
.attrs
.hash_stable(&mut hcx, &mut stable_hasher);
if tcx.sess.opts.debugging_opts.incremental_relative_spans {
let span = tcx.untracked_resolutions.definitions.def_span(*def_id);

46
compiler/rustc_middle/src/hir/mod.rs
View File

@ -77,47 +77,21 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for OwnerNodes<'tcx> {
}
}
/// Attributes owner by a HIR owner. It is build as a slice inside the attributes map, restricted
/// to the nodes whose `HirId::owner` is `prefix`.
#[derive(Copy, Clone)]
/// Attributes owner by a HIR owner.
#[derive(Copy, Clone, Debug, HashStable)]
pub struct AttributeMap<'tcx> {
map: &'tcx BTreeMap<HirId, &'tcx [Attribute]>,
prefix: LocalDefId,
}
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for AttributeMap<'tcx> {
fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
let range = self.range();
range.clone().count().hash_stable(hcx, hasher);
for (key, value) in range {
key.hash_stable(hcx, hasher);
value.hash_stable(hcx, hasher);
}
}
}
impl<'tcx> std::fmt::Debug for AttributeMap<'tcx> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("AttributeMap")
.field("prefix", &self.prefix)
.field("range", &&self.range().collect::<Vec<_>>()[..])
.finish()
}
map: &'tcx BTreeMap<ItemLocalId, &'tcx [Attribute]>,
}
impl<'tcx> AttributeMap<'tcx> {
fn get(&self, id: ItemLocalId) -> &'tcx [Attribute] {
self.map.get(&HirId { owner: self.prefix, local_id: id }).copied().unwrap_or(&[])
fn new(owner_info: &'tcx Option<OwnerInfo<'tcx>>) -> AttributeMap<'tcx> {
const FALLBACK: &'static BTreeMap<ItemLocalId, &'static [Attribute]> = &BTreeMap::new();
let map = owner_info.as_ref().map_or(FALLBACK, |info| &info.attrs);
AttributeMap { map }
}
fn range(&self) -> std::collections::btree_map::Range<'_, rustc_hir::HirId, &[Attribute]> {
let local_zero = ItemLocalId::from_u32(0);
let range = HirId { owner: self.prefix, local_id: local_zero }..HirId {
owner: LocalDefId { local_def_index: self.prefix.local_def_index + 1 },
local_id: local_zero,
};
self.map.range(range)
fn get(&self, id: ItemLocalId) -> &'tcx [Attribute] {
self.map.get(&id).copied().unwrap_or(&[])
}
}
@ -163,7 +137,7 @@ pub fn provide(providers: &mut Providers) {
let index = tcx.index_hir(());
index.parenting.get(&id).copied().unwrap_or(CRATE_HIR_ID)
};
providers.hir_attrs = |tcx, id| AttributeMap { map: &tcx.hir_crate(()).attrs, prefix: id };
providers.hir_attrs = |tcx, id| AttributeMap::new(&tcx.hir_crate(()).owners[id]);
providers.source_span = |tcx, def_id| tcx.resolutions(()).definitions.def_span(def_id);
providers.def_span = |tcx, def_id| tcx.hir().span_if_local(def_id).unwrap_or(DUMMY_SP);
providers.fn_arg_names = |tcx, id| {

1
compiler/rustc_middle/src/lib.rs
View File

@ -30,6 +30,7 @@
#![feature(bool_to_option)]
#![feature(box_patterns)]
#![feature(core_intrinsics)]
#![feature(const_btree_new)]
#![feature(discriminant_kind)]
#![feature(exhaustive_patterns)]
#![feature(if_let_guard)]

3
compiler/rustc_middle/src/ty/context.rs
View File

@ -2828,7 +2828,8 @@ fn ptr_eq<T, U>(t: *const T, u: *const U) -> bool {
}
pub fn provide(providers: &mut ty::query::Providers) {
providers.in_scope_traits_map = |tcx, id| tcx.hir_crate(()).trait_map.get(&id);
providers.in_scope_traits_map =
|tcx, id| tcx.hir_crate(()).owners[id].as_ref().map(|owner_info| &owner_info.trait_map);
providers.resolutions = |tcx, ()| &tcx.untracked_resolutions;
providers.module_exports = |tcx, id| tcx.resolutions(()).export_map.get(&id).map(|v| &v[..]);
providers.crate_name = |tcx, id| {

6
compiler/rustc_resolve/src/late.rs
View File

@ -1994,7 +1994,7 @@ impl<'a: 'ast, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
if ns == ValueNS {
let item_name = path.last().unwrap().ident;
let traits = self.traits_in_scope(item_name, ns);
self.r.trait_map.as_mut().unwrap().insert(id, traits);
self.r.trait_map.insert(id, traits);
}
if PrimTy::from_name(path[0].ident.name).is_some() {
@ -2479,12 +2479,12 @@ impl<'a: 'ast, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
// the field name so that we can do some nice error reporting
// later on in typeck.
let traits = self.traits_in_scope(ident, ValueNS);
self.r.trait_map.as_mut().unwrap().insert(expr.id, traits);
self.r.trait_map.insert(expr.id, traits);
}
ExprKind::MethodCall(ref segment, ..) => {
debug!("(recording candidate traits for expr) recording traits for {}", expr.id);
let traits = self.traits_in_scope(segment.ident, ValueNS);
self.r.trait_map.as_mut().unwrap().insert(expr.id, traits);
self.r.trait_map.insert(expr.id, traits);
}
_ => {
// Nothing to do.

8
compiler/rustc_resolve/src/lib.rs
View File

@ -930,7 +930,7 @@ pub struct Resolver<'a> {
/// `CrateNum` resolutions of `extern crate` items.
extern_crate_map: FxHashMap<LocalDefId, CrateNum>,
export_map: ExportMap,
trait_map: Option<NodeMap<Vec<TraitCandidate>>>,
trait_map: NodeMap<Vec<TraitCandidate>>,
/// A map from nodes to anonymous modules.
/// Anonymous modules are pseudo-modules that are implicitly created around items
@ -1185,8 +1185,8 @@ impl ResolverAstLowering for Resolver<'_> {
self.next_node_id()
}
fn take_trait_map(&mut self) -> NodeMap<Vec<TraitCandidate>> {
std::mem::replace(&mut self.trait_map, None).unwrap()
fn take_trait_map(&mut self, node: NodeId) -> Option<Vec<TraitCandidate>> {
self.trait_map.remove(&node)
}
fn opt_local_def_id(&self, node: NodeId) -> Option<LocalDefId> {
@ -1363,7 +1363,7 @@ impl<'a> Resolver<'a> {
label_res_map: Default::default(),
extern_crate_map: Default::default(),
export_map: FxHashMap::default(),
trait_map: Some(NodeMap::default()),
trait_map: NodeMap::default(),
underscore_disambiguator: 0,
empty_module,
module_map,